Dual-handset telephone base



FIG. 1 is a front perspective view of the dual-handset telephone base;

FIG. 2 is a front plan view of the dual-handset telephone base of FIG. 1;

FIG. 3 is a rear plan view of the dual-handset telephone base of FIG. 1;

FIG. 4 is a bottom elevation view of the dual-handset telephone base of FIG. 1;

FIG. 5 is a top elevation view of the dual-handset telephone base of FIG. 1;

FIG. 6 is a right side elevation view of the dual-handset telephone base of FIG. 1;

FIG. 7 is a left side elevation view of the dual-handset telephone base of FIG. 1; and,

FIG. 8 is another front perspective view of the dual-handset telephone base of FIG. 1 with two example handsets shown in broken line.

The broken line showing of environmental structures is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a dual-handset telephone base, as shown and described. 